Electrical connecting device



Aug. 21, 1923.

R. B. BENJAMIN ELECTRICAL CONNECTING DEVICE Filed Sept 23 Patented Aug. 21, 11223.

siren snares a, ,Sgiltl EEATNT lltCiE.

REUBEN BENJAMIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN ELECTRIC MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 013' Ill-111N018.

ELECTRICAL CONNIlCTING DEVICE.

Application filed September 23, 1918. Serial No. 255,254.

To all whom it may concern:

Be it known that I, RntmnN B. BENJA- MIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Electrical Connecting Devices, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to improvements in electrical connecting devices, and particularly to a connecting device which is adapted to be inserted into a socket of the Ediswan type and to receive a lamp, plug or the like which is provided with an outer contact shell of the Edison type.

One of the objects of the invention is to provide a device of this type which is of simple and economical construction. Another object. is to provide means for preventing the turning of the threaded socket shell when the lamp or other translating devices is screwed thereinto.

In the accompanying drawings,

Fig. 1 shows a longitudinal axial section taken through the device on the line 11 of Fig. 2, looking in the direction of the arrows.

Fig. 2 shows a similar section taken on the line 2-2 of Fig. 1, looking in the direction of the arrows.

Fig. 3 is an end view of the device looking into the Edison threaded socket shell.

In the several figures of the drawings, in which like reference numerals indicate the same parts throughout, 10 is an insulating base member formed of porcelain or other suitable material and provided with a pair of longitudinally extending passages 11 and 12 through each of which extends a pin. These pins, designated 13 and 14, have their heads 15 and 16 countersunk in recesses in the outer end of the member 10 so as to be substantially flush with the face of the latter. The inner end of the pin 13 extends through an opening in the bottom of a cup-shaped member 17 which forms the outer contact of the lamp receiving ortion of the device. This cup-shaped m mber 17 is threaded to receive the ordinary wardly over the bottom of the cup-shaped member 17 and is thereby held in position. An outer metallic casing shell 19 encloses the insulating sleeve 18 and has its inner end flanged inwardly and extending over the inner end of the sleeve 18. The inner end of the insulating member 10 is cut away at 20 so as to leave a shoulder against which the inturned edge of the casing shell 19 abuts so as to maintain these parts in proper relative position against sidewise displacement. The inturned inner edges of the insulated sleeve 18 and casing 19 are clamped firmly between the bottom of the socket shell 17 and the inner fue of the insulating member 10.

The inner end of the pin 14 extends through an opening in the center contact member 22 and is headed over to hold the latter in place. This member 22 consists of a strip of resilient conducting material which is first bent to U shape but with one of its ends longer than the other, the ends then being bent outwardly or away from each other. The longer of these ends extends toward and across the axis of the threaded shell 17 and normally springs forward or away from the bottom of the socket so as to provide a yielding center contact for engagement with the center contact of the lamp or plug when the latter is inserted into the socket. An insulating disk 23 lies in the bottom of the socket and is held in place by the outturned ends of the center contact member 22. This insulating disk is formed with an opening 24 to accommodate the member 22, and another opening 25 which provides access to the headed and of pin 13 during the manufacture of the article. Covering the disk 23 is a thin disk 26 which is composed of vulcanized fibre or similar insulating material, this disk having a slot 27 through which extends the longer or lam -engaging end of the contact member 22. his disk 26 covers and conceals the openings 24: and 25 and the shorter end of the contact member 22 and is held in place by this member.

To prevent the turnin of the casing 19 with respect to the insu ating member 10,

the latter is formed with a, pair of cars 27 v and 28 which extend into correspondingly located recesses in the face of the insulating member 10. These ears are sheared from the material of the casingand bend upward during the process of manufacture of the casing shell. A similar pair of ears 29 and 30 are sheared up from the bottom of the shell 17 and extend upward into a rectangular opening 31 which is formed in the insulating base member 10.

The bayonet projections which engage in the bayonet slots of the Edi-swan socket when the device is used with such a socket, are formed by inserting a pin 32 into a passage which extends radially with respect to the plug. This passage is formed in the process of molding the porcelain of which the member 10 is composed and meets the recess 31 which extends in from the inner end of the part 10. A pair of laterally extending wings 33 and 34 are formed on the pin 32, and after it has been inserted into the member 10, the recess 31 is filled with wax or other suitable material, these wings then serving to prevent the removal of the pin from the member 10.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is-

1. An electrical connecting device com-- prising an insulating member, a pair of conducting members extending through said insulating member, parallel with its axis, a cup-shaped threaded contact shell held to said insulating member by one of said conducting members, an insulating sleeve surrounding said shell, and a casing shell surcontact shell carried thereby, an end contact for said insulating member extending therethrough to said contact shell, said insulating member being formed with a recess and having a lateral opening communicating with said recess, and a pin lying in said recess and extending therefrom through said opening and having projections thereon within said recess, said recess being filled with moldable material to retain said pin.

3. An electrical connecting device comprising an insulating base, a pair of conducting members extending through said insulating base, parallel with its axis, a cupshaped threaded contact shell held in said insulating member by one of said conducting members, an insulating sleeve surrounding said shell, and a casing shell surrounding said insulating sleeve, said sleeve and easing shell having each a portion extending between the insulating member and the bottom of the cup-shaped shell.

In witness whereof, I have hereunto subscribed my name.

REUBEN B. BENJAMIN. Witness:

C. L. HOPKINS. 

